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python Programming Glossary: exceptWhat is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python the object passed as parameter # you rarely use __new__ except when you want to control how the object # is created. # here..
Get last n lines of a file with Python, similar to tail http://stackoverflow.com/questions/136168/get-last-n-lines-of-a-file-with-python-similar-to-tail n offset while 1 try f.seek avg_line_length to_read 2 except IOError # woops. apparently file is smaller than what we want..
Differences between isinstance() and type() in python http://stackoverflow.com/questions/1549801/differences-between-isinstance-and-type-in-python as if it was of a certain desired type do it in a try except statement catching all exceptions that could arise if the argument.. desired type do it in a try except statement catching all exceptions that could arise if the argument was not in fact of that.. type or any other type nicely duck mimicking it and in the except clause try something else using the argument as if it was of..
A Transpose/Unzip Function in Python (inverse of zip) http://stackoverflow.com/questions/19339/a-transpose-unzip-function-in-python-inverse-of-zip calling zip with the arguments zip 'a' 1 'b' 2 'c' 3 'd' 4 except the arguments are passed to zip directly after being converted..
In Python, how do I determine if an object is iterable? http://stackoverflow.com/questions/1952464/in-python-how-do-i-determine-if-an-object-is-iterable on strings too try some_object_iterator iter some_object except TypeError te print some_object 'is not iterable' The iter built.. style of programming. ... try _ e for e in my_object except TypeError print my_object 'is not iterable' The collections..
Flatten (an irregular) list of lists in Python http://stackoverflow.com/questions/2158395/flatten-an-irregular-list-of-lists-in-python here here here here but as far as I know all solutions except for one fail on a list like this L 1 2 3 4 5 6 Where the desired..
The Python yield keyword explained http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained for i in mygenerator ... print i 0 1 4 It is just the same except you used instead of . BUT you can not perform for i in mygenerator.. by one. Yield Yield is a keyword that is used like return except the function will return a generator. def createGenerator ..... is coming no more money print corner_street_atm.next type 'exceptions.StopIteration' wall_street_atm hsbc.create_atm # it's even..
Dynamic module import in Python http://stackoverflow.com/questions/301134/dynamic-module-import-in-python myapp.commands. s command fromlist myapp.commands except ImportError # Display error message command_module.run This..
What does ** (double star) and * (star) do for python parameters? http://stackoverflow.com/questions/36901/what-does-double-star-and-star-do-for-python-parameters 1 2 3 1 2 3 The kwargs will give you all keyword arguments except for those corresponding to a formal parameter as a dictionary...
Non-blocking read on a subprocess.PIPE in python http://stackoverflow.com/questions/375427/non-blocking-read-on-a-subprocess-pipe-in-python threading import Thread try from Queue import Queue Empty except ImportError from queue import Queue Empty # python 3.x ON_POSIX.. blocking try line q.get_nowait # or q.get timeout .1 except Empty print 'no output yet' else # got line # ... do something..
How to improve performance of this code? http://stackoverflow.com/questions/4295799/how-to-improve-performance-of-this-code 0 None closedlist while 1 try f current openlist.get except IndexError current None if current is None print No solution..
http://stackoverflow.com/questions/509211/pythons-slice-notation array a 2 # last two items in the array a 2 # everything except the last two items Python is kind to the programmer if there..
Python read a single character from the user http://stackoverflow.com/questions/510357/python-read-a-single-character-from-the-user the screen. def __init__ self try self.impl _GetchWindows except ImportError self.impl _GetchUnix def __call__ self return self.impl..
How do I duplicate sys.stdout to a log file in python? http://stackoverflow.com/questions/616645/how-do-i-duplicate-sys-stdout-to-a-log-file-in-python output individually as well. Simply I want to do the same except duplicate instead of redirect. At first blush I thought that..
What is the best way to implement nested dictionaries in Python? http://stackoverflow.com/questions/635483/what-is-the-best-way-to-implement-nested-dictionaries-in-python self item try return dict.__getitem__ self item except KeyError value self item type self return value Testing a AutoVivification..
What is a metaclass in Python? http://stackoverflow.com/questions/100003/what-is-a-metaclass-in-python either instances of classes or instances of metaclasses. Except for type . type is actually its own metaclass. This is not something..
Is there any way to know if the value of an argument is the default vs. user-specified? http://stackoverflow.com/questions/11251119/is-there-any-way-to-know-if-the-value-of-an-argument-is-the-default-vs-user-spe 3 calls. python arguments share improve this question Except for inspecting the source code there is no way to tell the three..
Python: Check if a string represents an int, Without using Try/Except? http://stackoverflow.com/questions/1265665/python-check-if-a-string-represents-an-int-without-using-try-except Check if a string represents an int Without using Try Except Is there any way to tell whether a string represents an integer..
http://stackoverflow.com/questions/13210436/get-full-traceback and func functions import traceback def func try raise Exception 'Dummy' except traceback.print_exc def func2 func func2 When.. most recent call last File test.py line 5 in func raise Exception 'Dummy' Exception Dummy traceback.format_stack is not what.. last File test.py line 5 in func raise Exception 'Dummy' Exception Dummy traceback.format_stack is not what i want as need traceback..
a iterative algorithm for fibonacci numbers http://stackoverflow.com/questions/15047116/a-iterative-algorithm-for-fibonacci-numbers it will already stop and return the first value 1. Except when n is 0 in which case the function is made to return 0 itself..
PyEval_InitThreads in Python 3: How/when to call it? (the saga continues ad nauseum) http://stackoverflow.com/questions/15470367/pyeval-initthreads-in-python-3-how-when-to-call-it-the-saga-continues-ad-naus this is exactly what this stackoverflow answer says. Except when I actually try this in practice the Python interpreter..
How to assign a variable in IF, and then return it. (Python) http://stackoverflow.com/questions/1550134/how-to-assign-a-variable-in-if-and-then-return-it-python fruit Why doesn't the 2nd one work I want a 1 liner. Except the 1st one will call the function TWICE. How to make it 1 liner..
Remove a tag using BeautifulSoup but keep its contents http://stackoverflow.com/questions/1765848/remove-a-tag-using-beautifulsoup-but-keep-its-contents tag.name not in VALID_TAGS tag.extract soup.renderContents Except I don't want to throw away the contents inside the invalid tag...
Python 32-bit memory limits on 64bit windows http://stackoverflow.com/questions/18282867/python-32-bit-memory-limits-on-64bit-windows the file. Around file 4284 5118 the program throws a MemoryException However the task manager says that the memory usage of python.exe.. 1 471.3MB of data. So everything seems to be checking out. Except for the part where I get a memory error. I absolutely have more..
How to plot a CCDF graph by reading data from “file.txt”? [closed] http://stackoverflow.com/questions/20406171/how-to-plot-a-ccdf-graph-by-reading-data-from-file-txt
Trouble with class inheritance - Python http://stackoverflow.com/questions/20413043/trouble-with-class-inheritance-python 's with elif 's since else does not support a condition . Except the ones in __init__ I removed every double underscore. This..
Scala equivalent to python generators? http://stackoverflow.com/questions/2137619/scala-equivalent-to-python-generators i if i 0 for j in foo i 1 yield j for i in foo 5 print i Except foo may be more complex and recurse through some acyclic object..
String comparison in Python: is vs. == [duplicate] http://stackoverflow.com/questions/2988017/string-comparison-in-python-is-vs the top answer to which seemed to be just what I needed. Except the answer it gave was counter to my experience. Specifically..
How to split a dos path into its components in Python http://stackoverflow.com/questions/3167154/how-to-split-a-dos-path-into-its-components-in-python answer is not to do that . Don't be any of these people. Except for the one who mixed up slashes and backslashes you could be..
Is Python good for big software projects (not web based)? http://stackoverflow.com/questions/35753/is-python-good-for-big-software-projects-not-web-based I really love it as language especially the productivity . Except for the performances a problem that could be sometimes solved..
capitalization of library class names http://stackoverflow.com/questions/4032925/capitalization-of-library-class-names the class names is irrelevant it doesn't signify anything. Except that Python has sometimes grown organically and the standard..
Python: How to ignore an exception and proceed? [duplicate] http://stackoverflow.com/questions/574730/python-how-to-ignore-an-exception-and-proceed duplicate This question already has an answer here Try Except in Python How to properly ignore Exceptions 9 answers .. answer here Try Except in Python How to properly ignore Exceptions 9 answers I have a try...except block in my code..
Formatting messages to send to socket.io node.js server from python client http://stackoverflow.com/questions/6692908/formatting-messages-to-send-to-socket-io-node-js-server-from-python-client return sid hbtimeout ctimeout else raise TransportException else raise InvalidResponseException try sid hbtimeout ctimeout.. else raise TransportException else raise InvalidResponseException try sid hbtimeout ctimeout handshake HOSTNAME PORT #handshaking.. HOSTNAME PORT #handshaking according to socket.io spec. Except Exception as e print e sys.exit 1 ws websocket.create_connection..
Try/Except in Python: How to properly ignore Exceptions? http://stackoverflow.com/questions/730764/try-except-in-python-how-to-properly-ignore-exceptions Except in Python How to properly ignore Exceptions When you just want.. Except in Python How to properly ignore Exceptions When you just want to do a try except without handling.. try doSomething except pass or try doSomething except Exception pass The difference is that the first one will also catch..
Python split() without removing the delimiter [duplicate] http://stackoverflow.com/questions/7866128/python-split-without-removing-the-delimiter what I need it to.. for line in all_lines s line.split ' ' Except it removes all the ' ' delimiters. So html head Turns into '..
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